Tech

February 6, 2013

New water jets could propel LCS to greater speeds

onr-water-jetsThe Navy’s fifth Littoral Combat Ship, Milwaukee, will be the first to benefit from new high-power density water jets aimed at staving off rudder and propeller damage experienced on high-speed ships.

The product of an Office of Naval Research Future Naval Capabilities program, the waterjets arrived last month at the Marinette Marine shipyard in Wisconsin, where Milwaukee (LCS 5) is under construction.

“We believe these waterjets are the future,” said Dr. Ki-Han Kim, program manager in ONR’s Ship Systems and Engineering Research Division. “Anything that we can do to keep ships ready to go will ultimately benefit our war fighters.”

Chief of Naval Operations Adm. Jonathan Greenert’s 2013-2017 Navigation Plan calls for fielding improved ships to support counterterrorism and irregular warfare missions at sea and ashore. The LCS will play a big role in the Navy’s plan as a modular, adaptable vessel for use against diesel submarines, littoral mines and attacks by small surface craft.

Developed by Rolls-Royce Naval Marine in Walpole, Mass., in collaboration with ONR and Naval Surface Warfare Center, Carderock Division, the new Axial-Flow Waterjet Mk-1 can move nearly half a million gallons of seawater per minute, providing more thrust per unit than current commercial water jets. Four of the new water jets will propel the LCS to speeds greater than 40 knots.

Researchers believe the smaller, more efficient wate jets will help the LCS avoid excessive maintenance costs associated with cavitation — a phenomenon that occurs when changes in pressure create air bubbles on rotating machinery, such as marine propellers. Repeated occurrences can cause whole chunks of metal to wear away, leading to frequent repairs and replacements.

The water jets’ new design could increase their lifespan between repairs.

The FNC program that oversaw development of this technology proved to be as adaptable as LCS. The water jets originally were slated to benefit another ship program that was discontinued. Instead of cancelling the water jets program, officials regrouped and shifted their focus to designing a product that would improve the performance of LCS.

ONR’s FNC program saves taxpayer money by streamlining processes to deliver cutting-edge products within five years. The water jets project began in 2007, and the delivery last month to the shipyard marked its successful completion.

Next up for the water jets will be full-scale sea trials on Milwaukee (LCS 5), expected to occur in the next 24 months.

Eventually, the water jets could end up on 10 LCS under contract to be built by Lockheed Martin.

The Department of the Navy’s Office of Naval Research provides the science and technology necessary to maintain the Navy and Marine Corps’ technological advantage. Through its affiliates, ONR is a leader in science and technology with engagement in 50 states, 70 countries, 1,035 institutions of higher learning and 914 industry partners. ONR employs approximately 1,400 people, comprising uniformed, civilian and contract personnel, with additional employees at the Naval Research Lab in Washington, D.C.

 




All of this week's top headlines to your email every Friday.


 
 

 

Headlines July 30, 2014

News: Software to power F-35 running as much as 14 months late - Software needed to operate Lockheed Martin’s F-35 jet, the Pentagon’s costliest weapons system, may be as much as 14 months late for required flight testing, according to a Pentagon review.   Business: Lockheed will turn on JLTV production line In August; 6-D truck...
 
 

News Briefs July 30, 2014

U.S. military deaths in Afghanistan at 2,197 As of July 29, 2014, at least 2,197 members of the U.S. military had died in Afghanistan as a result of the U.S.-led invasion of Afghanistan in late 2001, according to an Associated Press count. At least 1,819 military service members have died in Afghanistan as a result...
 
 
Lockheed Martin photograph by Tom Reynolds

F-35B successfully completes wet runway, crosswind testing

Lockheed Martin photograph by Tom Reynolds F-35B aircraft BF-4, piloted by Lockheed Martin Test Pilot Dan Levin, starts down the runway as part of wet runway and crosswind testing at Edwards AFB, Calif. In an important program ...
 

 
boeing-chinook

Boeing delivers first U.S. Army multiyear II configured Chinook

Boeing July 29 delivered the first multiyear II configured CH-47F Chinook helicopter to the U.S. Army one month ahead of schedule. The delivery was celebrated in a ceremony at the production facility in Ridley Township, Penn. ...
 
 
Army photograph by SSgt. Angela Stafford

Engineers developing safer, more accurate tracer round

Army photograph Tracer rounds enable the shooter to follow the projectile trajectory to make aiming corrections. However, the light emitted by these rounds also gives away the position of the shooter. Engineers at Picatinny Ars...
 
 
NASA photograph by Carla Thomas

Katherine Lott awarded NASA Armstrong employee scholarship

NASA photograph by Carla Thomas Katherine Lott, the recipient of the 2014 NASA Armstrong Employee Exchange Council Joseph R. Vensel Memorial Scholarship, is congratulated by NASA Armstrong center director David McBride. Flankin...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>